Software Update in Mac OS X 10.4.2, when the user marks all updates to be ignored, exits without asking the user to reset the status of the updates, which could prevent important, security-relevant updates from being installed.
https://exchange.xforce.ibmcloud.com/vulnerabilities/44464
http://www.vupen.com/english/advisories/2005/2256
http://www.securityfocus.com/bid/15252
http://securitytracker.com/id?1015124
http://secunia.com/advisories/17368
http://lists.apple.com/archives/security-announce/2005/Oct/msg00000.html